SmartCall JP is a free Android app developed by Sadiatec Co. Ltd that allows users to make low-cost phone calls from their smartphones. With just three simple steps, users can make calls at affordable rates. First, they need to download and install the dialer. Next, they can purchase a SmartCallJP card from any reseller or directly from the developers. Finally, they need to scratch off the "Username" and "Password" on the card, enter the information into the dialer to log in, and start making calls.

The app is easy to use and is an excellent solution for anyone looking to save money on their phone bills. SmartCall JP is a useful tool for people who frequently make long-distance calls, as it offers affordable rates for both domestic and international calls. The app is available for free on the Android platform and is a great choice for anyone looking to save money on their phone bills.